The concept of civil society does not have an official definition. It is a fuzzy and controversial concept which, like that of an NGO to which it is often associated, has nevertheless succeeded in becoming generalized, this forming an integral part of the vocabulary of politicians and social actors both in the North and South. is not new nor its meaning has undergone some evolution over time, recently the concept taken on a new dimension with what is commonly called "the emergence of global civil society" as well nowadays when we talk about society civil society refers mainly to NGO and formal or informal popular movements that act as counter-powers to the government. We often speak (civil society organizations) showing the heterogeneity that characterizes it, the evolution of this concept shows the rise of the role of civil society as an actor of international governance.

The city policy unlike urban policy aims to rebuild the pieces of the stigmatized city located mostly to the peripheries of cities. Indeed, those who formulated the policy of the city, trying to apply a new public policy articulated around socializing ideology. The cognitive dimensions of these decisions aim to create socially harmonious cities, egalitarian and free from the concrete contractors of selfishness and greed architects and interest.
New city policies are experiences to create an integrated man, released from its bellicose provisions in a city increasingly oppressive and dangerous. Max Weber pointed out that the city is not a natural thing, but is the result largely of urban policies, streamlining processes, and even bureaucracy. We must streamline the city knowing that the regulatory planning and planner are exceeded; it must therefore, help the development of sustainable cities, make possible the participation of the population, and allow modest citizens to live in decent material conditions.